This website is dedicated to the construction of wood gasifiers that can be used to run a gasoline engine with. Woodgas has been around for a long time and it. and FEMA EMWE We’rk Unit D. APPROVED FOR . implified version of the World War II, Imbert wood gas generator. This simple, stratified. If you google “fema gasifier” there will be several documents that should pop up. Below is an example.

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The guidelines must be met to match the Imbert to the engine it will be running to achieve the correct gasiffication to crack the tars down into a useful part of the fuel. Bridging can be prevented by stirring, shaking, or by agitating the grate or by having it agitated by the vehicle’s movement.

The use of wood to provide heat is as old as mankind; but by burning the wood we only utilize about one-third of its energy. My experience is very limited, but I remain convinced that a FEMA using a very dry and regularly sized wood fuel can serve in a stationary application reliably for an extended period where the output of the system remains relatively high to keep temperature up.

This is one page of the website that I’ve been looking forward to doing a write-up on. A closure is only used to preserve the fuel when the engine is stopped.

FEMA Gasifier

A gas generator unit is, simultaneously, an energy converter and a filter. Woof or Reed and Das The same chemical laws which govern combustion processes also apply to gasification. The liquid fuels used in gasoline engines are vaporized before they enter the combustion chamber above the pistons.

I have always wanted to have a neighbor just like you – Fred Rogers. Because of the wood gasifier’s somewhat low efficiency, the inconvenience of operation, and the potential health risks from toxic fumes, most of such units were abandoned when oil again became available in The uppermost zone contains unreacted fuel through which air and oxygen enter. The FEMA is a good unit for learning, so in that sense it can be useful beyond an emergency unit. All over Europe, Asia, and Australia, millions of gas generators were in operation between and The cylindrical shape is easy to fabricate and permits continuous flow of fuel.


The first question many people ask about gasifiers is, ‘Where does the combustible gas come from? Due to it’s lower temperature range it is fasification heavy tar producer. No concerns of the fire climbing up through the wood hopper due femx the wood hopper being a sealed gasidication free fuel holding vessel. One example welded a restriction plate on the end of the fire tube and supplied air to the fire tube via nozzles, and closed off the hopper so gasificafion air entered the system through the nozzles.

It can be constructed with the most basic materials on hand. Therefore, in any case I expect a FEMA design to introduce tar into an engine at a rate many times higher than an Imbert all else equal. If you google “fema gasifier” there gasificatikn be several documents that should pop up.

In a sense, gasification is a form of incomplete combustion; heat from the burning solid fuel creates gases which are unable to burn completely, due to insufficient amounts of oxygen from the available supply of air.

Library / FEMA Gasifier | Drive On Wood!

Thanks for the added link. I consider the primary purpose of this forum as a resource for education, and I’m trying to encourage the reader to take the claim seriously. This is an important distinction. I don’t want the thread to turn “heated” to discourage fems in anyway Personally, I find the videos rather interesting and chose not to marginalize the author’s efforts. Most gasificatlon the volatile components of the fuel are burned in this zone and provide heat for continued pyrolysis reactions.

Also, I express some skepticism that any filtration system will catch all the tar. However, petroleum shortages during World War II led to widespread gas generator applications in the transportation industries of Western Europe.

No special fuel shape or pretreatment is necessary; any blocky fuel can be used. It should be acknowledged that there are alternate technologies such as methane production or use of alcohol fuels for keeping internal combustion engines in operation during a prolonged petroleum crisis; the wood gasifier unit described in this report represents only one solution to the problem.


This report attempts to preserve the knowledge about wood gasification as put into practical use during World War II. The nitrogen is not combustible; however, it does occupy volume and dilutes the wood gas as it enters and burns in an engine.

So, there is some evidence that a few relatively simple modifications to the FEMA can dramatically improve its performance. A simpler filtering system. However, this report is concerned with the operation of four-cylinder gasoline engines rated from 10 to horsepower. It can be built with a minimum of tools. Wooc is a surprising duration of energy generation and the model can be scaled to meet higher energy requirements. This simplified design employs a balanced, negative-pressure concept in which the old type of sealed fuel hopper is no longer necessary.

The United States, never faced with such prolonged or severe oil shortages, has lagged far behind Europe and the Orient in familiarity with and application of this technology; however, a catastrophe could so severely disrupt the supply of petroleum in this country that this technology might be critical in meeting the energy needs of some essential economic activities, such as the production and distribution of food.

During operation of this gasifier, air passes uniformly downward through four zones, hence the name ‘stratified: For example, the body of the unit consists of a galvanized metal garbage can atop a small metal drum; common plumbing fittings throughout; and a large, stainless steel mixing bowl for the grate. New Aquaponics Series from Jack Spirko. Gasification is a method of collecting the smoke and its combustible components.

This simple, stratified, downdraft gasifier unit can be constructed from materials that would be widely available in the United States in a prolonged petroleum crisis.

However, all enthusiasts I know of who use gasification on a regular basis and who started with a FEMA unit have moved on. However, it’s probably best to take the next step and go with what is known as the “Imbert” design.